2Grash AK, Carabell BA, Cepin D, et al. Left ventricular ejection performance and systolic muscle function in patients with mitral stenosis. Circulation, 1983,67(1):148.
3Harrisos JK, Davidson CJ, Hermiller JB, et al. Left ventrcular filling and ventricular diastolic Performance after percutanous balloon valvuloplasty.Am J Cardiol,1992,69(1):108.